anchor

Abstract

Provided is an anchor with which the number of work steps during construction can be reduced and multiple types of fixed objects can be selectively fixed. An anchor 10 comprises a shaft 22 embedded in the ground, a head 24 that is provided to an upper end 22a of the shaft 22 and that receives input of propulsive force for propelling the shaft 22 underground, and a sleeve 26 having a cylindrical peripheral wall 42 disposed around the periphery of the head 24. The outer diameter of the head 24 is greater than the outer diameter of the shaft 22, which ensures a lower surface 32a in an outer peripheral part 32 of the head 24. An upper end 42a of the peripheral wall 42 is provided with an opening 44 into which first fixed objects 12c, 12d, 12f are fitted as necessary. A lower end 42b of the peripheral wall 42 is provided with a pressing part 46 having an opposing surface 48 that opposes the outer peripheral part 32 (lower surface 32a) of the head 24 from below and a pressing surface 50 that is pressed against second fixed objects 12a, 12b from above as necessary. FIG. 3

Description

[Technical Field]

[0001] The present invention relates to an anchor for fixing an object to the ground surface. [Background technology]

[0002] Patent Documents 1 and 2 listed below describe examples of conventional anchors. The anchor in Patent Document 1 is used to secure a bearing plate constructed in the ground to the ground, and includes a rod-shaped anchor body embedded in the ground, an anchoring member, and a nut. When securing the bearing plate, grout is first filled into a hole in the ground, and the anchor body is inserted and secured with the grout. At this time, a space is secured above the hole. Next, an anchoring member is placed in the space above the hole, and a nut is screwed onto a male thread provided at the upper end of the anchor body, so that the anchoring member is pressed against the bearing plate from above by the pressure applied by the nut.

[0003] On the other hand, the anchor in Patent Document 2 is used to secure a concrete support body constructed on a slope to the slope, and includes a rod-shaped anchor body to be embedded in the slope, an anchor mounting washer, and a ball seat nut body. When securing the concrete support body, grout is first filled into the anchor mounting hole provided in the slope, and the anchor body is inserted and secured with the grout. Next, the anchor mounting washer is placed on the surface of the concrete support body, and the ball seat nut body is screwed onto the male thread provided on the upper end of the anchor body, so that the pressure applied by the ball seat nut body presses the anchor mounting washer against the concrete support body from above. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-178969 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-246703

[0005] The anchors described in Patent Documents 1 and 2 require a large number of work steps during construction because holes for inserting the anchor body and anchor mounting holes must be pre-formed in the ground and slope. This results in problems of long construction time and high construction costs. Furthermore, because the anchors are designed specifically for fastening bearing plates and concrete supports, it is difficult to use the same anchor to fasten other types of objects. Summary of the Invention

[0006] The present invention has been made to address the above-mentioned problems, and has an object to provide an anchor that can reduce the number of work steps during installation and can selectively fasten multiple types of objects to be fastened.

[0007] In order to achieve the above object, the anchor according to the present invention is characterized in that it is an anchor for fixing an object on the ground surface, the anchor comprising: a rod-shaped shaft portion to be buried in the ground; and a rod-shaped rod-shaped rod attached to an upper end of the shaft portion and coaxially extending from the shaft portion. and integrated and a head portion to which a driving force for propelling the shaft portion underground is input, and a sleeve having a cylindrical peripheral wall portion disposed around the head portion, wherein the diameter of a first circumscribing circle circumscribing the head portion in a plan view is set to be larger than the diameter of a second circumscribing circle circumscribing the shaft portion. The head has a lower surface facing downward formed on its outer periphery. The upper end of the peripheral wall portion is provided with an opening into which a first fixing object is fitted as needed, and the lower end of the peripheral wall portion is provided with a fixing member that is fixed to the outer periphery of the head portion. On the lower surface formed The reason for this is that a pressing portion is provided which has an opposing surface that faces the second fixed object from below and a pressing surface that is pressed against the second fixed object from above as necessary.

[0008] In this configuration, the anchor has a head at the top end of the shank to which a driving force is input to propel the shank into the ground, so there is no need to pre-form a hole in the ground to insert the shank during installation. Therefore, the anchor can reduce the number of work steps during installation, shorten installation time, and reduce installation costs.

[0009] The anchor can fix a first object to the ground surface by fitting the first object into the opening in the peripheral wall. The anchor can fix a second object to the ground surface by pressing the second object from above with the pressing portion of the peripheral wall. In other words, the anchor according to the present invention can selectively fix multiple types of objects to the ground using a single anchor. Furthermore, because the opposing surface of the pressing portion of the anchor is positioned facing the outer periphery of the head from below, the entire sleeve can be prevented from moving upward relative to the shank embedded in the ground, and the second object can be prevented from coming off upward relative to the shank and head.

[0010] Furthermore, because the anchor has a peripheral wall portion of the sleeve disposed around the head, when the head and sleeve are buried in the ground, the peripheral wall portion can prevent soil from seeping in around the head. Therefore, the anchor according to the present invention makes it easy to apply the force of a tool (such as an impact wrench or hammer) to the head buried in the ground. Furthermore, because the sleeve can absorb external forces acting on the anchor near the ground surface, the external forces can be prevented from acting directly on the head, preventing damage or deformation of the head.

[0011] In order to achieve the above-mentioned object, the anchor of the present invention is characterized in that it is an anchor for fixing an object to be fixed on the ground surface, comprising: a rod-shaped shank that is buried in the ground; a head that is provided at the upper end of the shank so as to be coaxial with the shank and into which a propulsion force is input to propel the shank into the ground; and a sleeve having a cylindrical peripheral wall that is arranged around the head, wherein the diameter of a first circumscribing circle that circumscribing the head in a plan view is set to be larger than the diameter of a second circumscribing circle that circumscribing the shank; an opening that is provided at the upper end of the peripheral wall into which a first object to be fixed is fitted, as necessary; and a pressing part that is provided at the lower end of the peripheral wall, which has an opposing surface that faces the outer periphery of the head from below and a pressing surface that is pressed against a second object to be fixed from above, as necessary; a blind hole that is open upward and is formed in the head so as to be coaxial with the shank; and a first female thread that is formed on the inner surface of the blind hole into which a first male thread for joining a third object to the head is threaded, as necessary.

[0012] In this configuration, the anchor has a head at the upper end of the shank, through which a driving force for propelling the shank into the ground is input. Therefore, during construction, there is no need to pre-form a hole in the ground for inserting the shank. Therefore, the anchor can reduce the number of work steps during construction, shorten construction time, and reduce construction costs. The anchor can secure a first object to the ground surface by fitting it into the opening in the peripheral wall. The anchor can secure a second object to the ground surface by pressing the second object from above with the pressing portion of the peripheral wall. In other words, the anchor according to the present invention can selectively secure multiple types of objects to the ground using a single anchor. Furthermore, because the opposing surface of the pressing portion of the anchor is positioned opposite the outer periphery of the head from below, the entire sleeve can be prevented from moving upward relative to the shank embedded in the ground, and the second object can be prevented from detaching upward relative to the shank and head. Furthermore, because the anchor has a peripheral wall portion of the sleeve disposed around the head, when the head and sleeve are buried in the ground, the peripheral wall portion can prevent soil from seeping in around the head. Therefore, the anchor according to the present invention makes it easy to apply the force of a tool (such as an impact wrench or hammer) to the head buried in the ground. Furthermore, because the sleeve can absorb external forces acting on the anchor near the ground surface, the external forces can be prevented from acting directly on the head, preventing damage or deformation of the head. Furthermore, with this configuration, the anchor according to the present invention can secure a third object to the ground surface by threading the male thread into the female thread.

[0013] In order to achieve the above-mentioned object, the anchor of the present invention is characterized in that it is an anchor for fixing an object to be fixed on the ground surface, comprising: a rod-shaped shank that is buried in the ground; a head that is arranged coaxially with the shank at the upper end of the shank and into which a propulsive force is input to propel the shank into the ground; and a sleeve having a cylindrical peripheral wall that is arranged around the head, wherein the diameter of a first circumscribing circle that circumscribing the head in a plan view is set to be larger than the diameter of a second circumscribing circle that circumscribing the shank; an opening that is provided at the upper end of the peripheral wall into which a first object to be fixed can be fitted, if necessary; and a pressing part that is provided at the lower end of the peripheral wall and has an opposing surface that faces the outer periphery of the head from below and a pressing surface that is pressed against a second object to be fixed from above, if necessary; and a ring-shaped groove extending in the circumferential direction is formed on the outer periphery of the peripheral wall around the entire circumference.

[0014] In this configuration, the anchor has a head at the upper end of the shank, through which a driving force for propelling the shank into the ground is input. Therefore, during construction, there is no need to pre-form a hole in the ground for inserting the shank. Therefore, the anchor can reduce the number of work steps during construction, shorten construction time, and reduce construction costs. The anchor can secure a first object to the ground surface by fitting it into the opening in the peripheral wall. The anchor can secure a second object to the ground surface by pressing the second object from above with the pressing portion of the peripheral wall. In other words, the anchor according to the present invention can selectively secure multiple types of objects to the ground using a single anchor. Furthermore, because the opposing surface of the pressing portion of the anchor is positioned opposite the outer periphery of the head from below, the entire sleeve can be prevented from moving upward relative to the shank embedded in the ground, and the second object can be prevented from detaching upward relative to the shank and head. Furthermore, because the anchor has a peripheral wall portion of the sleeve disposed around the head, when the head and sleeve are buried in the ground, the peripheral wall portion can prevent soil from seeping in around the head. Therefore, the anchor according to the present invention makes it easy to apply the force of a tool (such as an impact wrench or hammer) to the head buried in the ground. Furthermore, because the sleeve can absorb external forces acting on the anchor near the ground surface, the external forces can be prevented from acting directly on the head, preventing damage or deformation of the head. Furthermore, with this configuration, the anchor according to the present invention has an annular groove disposed above the ground surface, allowing a rope or the like stretched along the ground surface to be threaded into the groove.

[0015] In order to achieve the above-mentioned object, the anchor of the present invention is characterized in that it is an anchor for fixing an object to be fixed on the ground surface, comprising: a rod-shaped shank that is buried in the ground; a head that is provided at the upper end of the shank so as to be coaxial with the shank and into which a propulsive force is input to propel the shank into the ground; and a sleeve having a cylindrical peripheral wall that is arranged around the head, wherein the diameter of a first circumscribing circle that circumscribing the head in a plan view is set to be larger than the diameter of a second circumscribing circle that circumscribing the shank; an opening that is provided at the upper end of the peripheral wall into which a first object to be fixed can be fitted, if necessary; a pressing part that is provided at the lower end of the peripheral wall and has an opposing surface that faces the outer periphery of the head from below and a pressing surface that is pressed against a second object to be fixed from above, if necessary; and a third male thread that is formed on the outer periphery of the peripheral wall into which a third female thread that is used to join a sixth object to the sleeve can be threaded, if necessary.

[0016] In this configuration, the anchor has a head at the upper end of the shank, through which a driving force for propelling the shank into the ground is input. Therefore, during construction, there is no need to pre-form a hole in the ground for inserting the shank. Therefore, the anchor can reduce the number of work steps during construction, shorten construction time, and reduce construction costs. The anchor can secure a first object to the ground surface by fitting it into the opening in the peripheral wall. The anchor can secure a second object to the ground surface by pressing the second object from above with the pressing portion of the peripheral wall. In other words, the anchor according to the present invention can selectively secure multiple types of objects to the ground using a single anchor. Furthermore, because the opposing surface of the pressing portion of the anchor is positioned opposite the outer periphery of the head from below, the entire sleeve can be prevented from moving upward relative to the shank embedded in the ground, and the second object can be prevented from detaching upward relative to the shank and head. Furthermore, because the anchor has a peripheral wall portion of the sleeve disposed around the head, when the head and sleeve are buried in the ground, the peripheral wall portion can prevent soil from seeping in around the head. Therefore, the anchor according to the present invention makes it easy to apply the force of a tool (such as an impact wrench or hammer) to the head buried in the ground. Furthermore, because the sleeve can absorb external forces acting on the anchor near the ground surface, the external forces can be prevented from acting directly on the head, preventing damage or deformation of the head. Furthermore, with this configuration, the anchor according to the present invention can secure a sixth object to be fixed on the ground surface by threading the third male thread into the third female thread.

[0017] Another feature of the anchor of the present invention is that it comprises a first nut having the third female thread threaded onto the third male thread, and the sixth fixed object has a plate-shaped base plate with a through hole, the peripheral wall portion being inserted into the through hole and the first nut being pressed against the upper surface of the base plate.

[0018] In this configuration, the anchor according to the present invention can fix the sixth object to be fixed on the ground surface by pressing the base plate with the first nut.

[0019] Another feature of the anchor according to the present invention is that it comprises a second nut having the third female thread that is threaded onto the third male thread, and the base plate is placed on an upper surface of the second nut.

[0020] In this configuration, the anchor according to the present invention can receive the base plate with the second nut, so the sixth object to be fixed can be fixed in a state spaced apart from the ground surface. Also, the anchor according to the present invention can reliably fix the base plate by sandwiching it between the first nut and the second nut.

[0021] Another feature of the anchor according to the present invention is that the pressing surface is tapered so that the outer diameter thereof decreases downward.

[0022] In this configuration, the anchor according to the present invention has a pressing portion that is tapered downward, making it easy to embed the sleeve in the ground.

[0023] Another feature of the anchor according to the present invention is that the sleeve is configured to be movable in the axial direction relative to the shaft portion.

[0024] In this configuration, the anchor of the present invention can disengage the head from the inner space of the sleeve by moving the sleeve downward relative to the head, making it easy to apply the force of a tool (impact wrench, hammer, etc.) to the head when propelling the shank underground.

[0025] Another feature of the anchor according to the present invention is that the shank is provided with a helical digging blade.

[0026] In this configuration, the anchor of the present invention can propel the entire head, shaft, and excavation blade in the axial direction underground by rotating the head, shaft, and excavation blade using the rotational force (thrust force) input from the head.

[0027] Another feature of the anchor according to the present invention is that the head portion is provided with a tool mounting portion to which a rotary tool for rotating the shank is mounted from the axial direction.

[0028] In this configuration, the anchor of the present invention allows a rotary tool (such as an impact wrench) to be attached axially to the tool attachment portion provided on the head, and combined with the fact that the head is provided at the upper end of the shaft, it is easy to attach the rotary tool.

[0029] Another feature of the anchor according to the present invention is that the outer peripheral surface of the peripheral wall portion is provided with a fitting surface into which a fourth object to be fixed is fitted, if necessary.

[0030] In this configuration, the anchor according to the present invention can fix the fourth object to the ground surface by fitting the fourth object to the mating surface.

[0031] Another feature of the anchor according to the present invention is that the inner surface of the peripheral wall portion is formed with a second female thread into which a second male thread for joining a fifth fixed object to the sleeve is threaded as needed.

[0032] In this configuration, the anchor according to the present invention can fix the fifth object to be fixed on the ground surface by threading the second male thread into the second female thread. [Brief explanation of the drawings]

[0033] [Figure 1] 1A and 1B are diagrams showing a first use state of an anchor according to a first embodiment of the present invention, in which (A) is a plan view and (B) is a front view (partial cross section). [Figure 2] 1 is a front view (partially in cross section) showing the configuration of an anchor according to a first embodiment. [Figure 3] 1A and 1B are diagrams showing the configuration of the main part of the anchor according to the first embodiment, in which (A) is a plan view and (B) is a front view (partial cross section). [Figure 4] 4 is a front view (partially in cross section) showing a second use state of the anchor according to the first embodiment. FIG. [Figure 5] FIG. 4 is a front view (partially in cross section) showing a third use state of the anchor according to the first embodiment. [Figure 6] FIG. 10 is a front view (partially in cross section) showing a fourth use state of the anchor according to the first embodiment. [Figure 7] FIG. 10 is a front view (partially in cross section) showing a fifth use state of the anchor according to the first embodiment. [Figure 8] FIG. 10 is a front view (partially in cross section) showing a sixth use state of the anchor according to the first embodiment. [Figure 9] FIG. 10 is a front view (partially in cross section) showing the configuration of an anchor according to a second embodiment of the present invention. [Figure 10] FIG. 10 is a front view (partially in cross section) showing the configuration of a main part of an anchor according to a third embodiment of the present invention. [Figure 11] FIG. 10 is a front view (partially in cross section) showing a first use state of the anchor according to the third embodiment. [Figure 12] FIG. 11 is a front view (partially in cross section) showing a second use state of the anchor according to the third embodiment. [Figure 13] 10A and 10B are diagrams showing the configuration of the main part of an anchor according to a fourth embodiment, in which (A) is a plan view and (B) is a front view (partial cross section). [Figure 14] 10A and 10B are views showing a first state of use of an anchor according to a fourth embodiment, in which (A) is a front view (partially cross-sectional), and (B) is an exploded front view (partially cross-sectional). [Figure 15] 10A and 10B are views showing a second state of use of the anchor according to the fourth embodiment, in which (A) is a front view (partially cross-sectional), and (B) is an exploded front view (partially cross-sectional). [Figure 16] 10A and 10B are views showing a third state of use of the anchor according to the fourth embodiment, in which (A) is a plan view and (B) is a front view (partial cross section). [Figure 17] 10A and 10B are views showing a fourth state of use of the anchor according to the fourth embodiment, in which (A) is a plan view, (B) is a front view (partially cross-sectional), and (C) is an exploded front view (partially cross-sectional). [Figure 18] 10A and 10B are diagrams showing the configuration of the main part of an anchor according to a fifth embodiment, in which (A) is a plan view and (B) is a front view (partial cross section). [Figure 19] 10A and 10B are views showing a first state of use of an anchor according to a fifth embodiment, in which (A) is a plan view and (B) is a front view (partial cross section). [Figure 20] (A) is a front view (partial cross-section) showing a second use state of the anchor according to the fifth embodiment, and (B) is a front view (partial cross-section) showing a third use state of the anchor according to the fifth embodiment. [Figure 21] FIG. 11 is a front view (partially in cross section) showing a fourth use state of the anchor according to the fifth embodiment. [Figure 22] 10A and 10B are views showing a fifth use state of the anchor according to the fifth embodiment, in which (A) is a plan view and (B) is a front view (partial cross section). DETAILED DESCRIPTION OF THE INVENTION

[0034] Hereinafter, an embodiment of an anchor according to the present invention will be described with reference to the drawings.

[0035] (Configuration of anchor according to first embodiment) FIG. 1 shows a first use state of the anchor 10 according to the first embodiment of the present invention, where (A) is a plan view and (B) is a front view (partial cross section). FIG. 2 is a front view (partial cross section) showing the configuration of the anchor 10. FIG. 3 shows the configuration of the main parts of the anchor 10, where (A) is a plan view and (B) is a front view (partial cross section). FIGS. 4 to 8 are front views (partial cross sections) showing other use states of the anchor 10.

[0036] The anchor 10 shown in Fig. 2 is used to selectively fix objects 12a to 12f (Figs. 1, 4 to 8) to the ground surface G. There are a wide variety of objects 12a to 12f to be fixed, and the anchor 10 is configured to be able to selectively employ one of three fixing methods depending on the type of object 12a to 12f to be fixed. In other words, it is configured to be able to selectively employ one of the "holding method," "fitting method," and "first screw-engagement method."

[0037] In the following description, in order to distinguish the fixing objects 12a to 12f based on the fixing method of the anchor 10, the fixing objects 12c, 12d, and 12f that employ the "fitting method" will be referred to as "first fixing objects 12c, 12d, and 12f," and the fixing objects 12a and 12b that employ the "holding method" will be referred to as "second fixing objects 12a and 12b." Furthermore, the fixing object 12e that employs the "first screwing method" will be referred to as "third fixing object 12e."

[0038] The second fixed object 12a shown in Figures 1(A) and (B) is a "fixture" for fixing the soccer goal 14. As shown in Figure 1(B), the soccer goal 14 has a lower frame 14a with a rectangular cross section, and the lower frame 14a is placed on the ground surface G. The second fixed object 12a has a plate-shaped pressing part 16 that presses down on the lower frame 14a from above, a plate-shaped base 18 that is placed on the ground surface G, and a plate-shaped connecting part 20 that connects the pressing part 16 and the base 18.

[0039] As shown in Fig. 1(A), a through-hole 18a is formed in the center of the base 18, through which a shaft 22 (Fig. 2) of the anchor 10, which will be described later, is passed in the vertical direction. A slit 18c is formed between the through-hole 18a and a side edge 18b of the base 18, and the through-hole 18a opens via the slit 18c toward the space to the side of the base 18. As shown in Fig. 1(B), the inner circumferential surface of the through-hole 18a is tapered so that the inner diameter decreases downward.

[0040] As shown in FIG. 2, the anchor 10 includes a shaft 22 that is embedded in the ground, a head 24 that is provided at an upper end 22a of the shaft 22 so as to be coaxial with the shaft 22, a sleeve 26 that is placed around the head 24 during use, and a cap 28.

[0041] The shaft 22 is a rod-shaped member that is buried in the ground from the ground surface G (FIG. 1(B)). In this embodiment, the shaft 22 is a round bar with a circular cross section, and the outer circumferential surface of the lower end 22b of the shaft 22 is tapered so that the outer diameter decreases downward. A spiral excavation blade 30 is provided on the outer circumferential surface of the portion between the lower end of the shaft 22 and slightly above the vertical center.

[0042] The diameter and length of the shaft portion 22 are not particularly limited, but in this embodiment they are set to a diameter of 8 mm and a length of 250 mm. Furthermore, the maximum outer diameter and axial length of the excavation blade 30 are not particularly limited, but in this embodiment they are set to a maximum outer diameter of 17 mm and an axial length of 150 mm. Furthermore, the method for forming the excavation blade 30 is not particularly limited, but in this embodiment a method is adopted in which the excavation blade 30 is welded to the shaft portion 22 inserted into the sleeve 26.

[0043] As shown in FIGS. 3A and 3B, the head 24 is a portion to which a propulsive force for propelling the shaft portion 22 underground is input, and is formed in a cylindrical shape so as to be coaxial with the shaft portion 22. The diameter L1 of a first circumscribing circle circumscribing the head 24 in a plan view is set to be larger than the diameter L2 of a second circumscribing circle circumscribing the shaft portion 22. This ensures that the outer peripheral portion 32 of the head 24 has a flat lower surface 32a (FIG. 3B) facing downward. Note that in this embodiment, since the head 24 has a circular shape in a plan view, the first circumscribing circle coincides with the outline of the head 24 in a plan view, and the diameter L1 of the first circumscribing circle coincides with the outer diameter of the head 24. Furthermore, since the shaft portion 22 has a circular shape in a plan view, the second circumscribing circle coincides with the outline of the shaft portion 22 in a plan view, and the diameter L2 of the second circumscribing circle coincides with the outer diameter of the shaft portion 22.

[0044] In this embodiment, the shaft 22 is propelled underground by the rotation of the excavation blade 30 (FIG. 2), and the propulsive force is input to the head 24 as a rotational force for rotating the excavation blade 30. For this reason, the head 24 is provided with a tool mounting portion 34 to which a rotary tool (such as an impact wrench) for rotating the entire shaft 22, head 24, and excavation blade 30 is attached from the axial direction. The tool mounting portion 34 in this embodiment has a first blind hole 36 that is hexagonal in plan view and formed in the center of the head 24, and when a rotational force is input to the head 24, a hexagonal wrench of the rotary tool (not shown) is inserted from the axial direction into the first blind hole 36.

[0045] As shown in Fig. 3(B), a second blind hole 38 that is circular in plan view and opens upward is formed in the portion of each of the shaft portion 22 and the head portion 24 located below the first blind hole 36, so as to be coaxial with the shaft portion 22, and a female thread (first female thread) 40 is formed on the inner circumferential surface of the second blind hole 38. As shown in Fig. 7, a male thread (first male thread) 74a of a male thread member 74 for joining the third fixed object 12e to the head portion 24 is threadedly engaged with the female thread 40 (first female thread) as necessary.

[0046] As shown in Figures 3(A) and (B), the sleeve 26 has a cylindrical peripheral wall portion 42 that is disposed around the head 24 during use. An upper end portion 42a of the peripheral wall portion 42 is provided with an opening 44 into which the first fixed objects 12c, 12d, and 12f (Figures 5, 6, and 8), described below, are fitted, as needed, and a lower end portion 42b of the peripheral wall portion 42 is provided with a pressing portion 46 (Figure 3(B)) that presses the second fixed objects 12a and 12b (Figures 1 and 4), as needed. The inner and outer diameters of the peripheral wall portion 42, excluding the lower end portion 42b, are uniformly determined over the entire axial length.

[0047] The holding portion 46 has an annular opposing surface 48 that faces the outer peripheral portion 32 (lower surface 32a) of the head 24 from below, and an annular pressing surface 50 that is pressed against the second fixed object 12a, 12b (FIGS. 1 and 4) from above as necessary. The pressing surface 50 is tapered so that the outer diameter decreases as it extends downward, thereby forming the holding portion 46 in a shape that tapers downward. The taper angle of the pressing surface 50 is set to the same as the taper angle of the inner peripheral surface of the through hole 18a shown in FIG. 1(B). Therefore, when the pressing surface 50 is used to hold the second fixed object 12a, the pressing surface 50 can be brought into surface contact with the inner peripheral surface of the through hole 18a.

[0048] The inner diameter of the retaining portion 46 is set to a size that is smaller than the outer diameter of the head 24 and larger than the outer diameter of the shank 22, and is uniform over the entire axial length. This ensures a gap between the inner peripheral surface of the retaining portion 46 and the outer peripheral surface of the shank 22, allowing the sleeve 26 to move axially relative to the shank 22.

[0049] The materials of the shaft portion 22, head portion 24, sleeve 26 and excavation blade 30 are not particularly limited, but in this embodiment, metals such as stainless steel, aluminum or iron are used.

[0050] The cap 28 shown in FIG. 2 is a component attached to the opening 44 to prevent dust and rainwater from accumulating inside the sleeve 26, and is made of a synthetic resin such as urethane. The cap 28 has a cylindrical fitting portion 28a that fits into the opening 44 and a cylindrical head portion 28b that is formed with an expanded diameter at the top of the fitting portion 28a. The outer diameter of the fitting portion 28a is set to be approximately the same size as the inner diameter of the opening 44 over the entire axial length. The cap 28 may be colored and used as a ground marker. In this case, the cap 28 becomes a "first fixed object" that is fixed to the ground surface G by a "fitting method."

[0051] (Anchor installation method according to the first embodiment) When fixing the second fixed object 12a shown in Figures 1(A) and (B) using the anchor 10 shown in Figure 2, the worker performs a "positioning process" to determine the position of the second fixed object 12a on the ground surface G, an "embedding process" to embed the shaft 22 of the anchor 10 into the ground, and a "pressing process" to press the second fixed object 12a with the sleeve 26, in this order.

[0052] In the "positioning step," first, the second fixed object 12a is positioned relative to the lower frame 14a of the soccer goal 14 placed on the ground surface G, and the position of the through-hole 18a relative to the ground surface G is confirmed. Thereafter, the second fixed object 12a is temporarily removed from the lower frame 14a.

[0053] In the "embedding process," first, the lower end 22b of the shank 22 is placed at the position of the through-hole 18a in the ground surface G, and the upper surface 24a of the head 24 is struck with a hammer or the like to embed the lower end 22b of the shank 22 into the ground. Next, a rotary tool (such as an impact wrench) is attached to the tool attachment portion 34 of the head 24, and a rotational force in the circumferential direction (forward direction) is input from the rotary tool to the head 24. This causes the head 24, shank 22, and excavation blade 30 to rotate as a whole in the forward direction, and the propulsive action of the excavation blade 30 embeds the shank 22 into the ground. When the pressing surface 50 of the sleeve 26 shown in FIG. 2 approaches the ground surface G, the input of rotational force by the rotary tool is stopped.

[0054] In the "pressing step," first, the second fixed object 12a is repositioned relative to the lower frame 14a of the soccer goal 14. At this time, the shaft 22 is placed in the through-hole 18a by passing it through the slit 18c (FIG. 1(A)) in the base 18. Next, further rotational force is input from the rotary tool to the head 24, and the shaft 22 and the excavating blade 30 are further advanced, thereby pressing the pressing surface 50 (FIG. 2) of the sleeve 26 against the inner circumferential surface of the through-hole 18a. Finally, the cap 28 is attached to the opening 44 of the sleeve 26.

[0055] (Other uses of the anchor according to the first embodiment) FIG. 4 is a front view (partially cross-sectional) showing the anchor 10 in a second use state, and FIG. 5 is a front view (partially cross-sectional) showing the anchor 10 in a third use state. FIG. 6 is a front view (partially cross-sectional) showing the anchor 10 in a fourth use state, and FIG. 7 is a front view (partially cross-sectional) showing the anchor 10 in a fifth use state. FIG. 8 is a front view (partially cross-sectional) showing the anchor 10 in a sixth use state. The second fixing object 12a shown in FIGS. 1(A) and 1(B) is a "fixing metal fitting" for fixing a soccer goal 14, but the type of fixing object may be changed as appropriate. In other words, the anchor 10 may be used to fix other fixing objects 12b to 12f shown in FIGS. 4 to 8.

[0056] The second object to be fixed 12b shown in Fig. 4 is a "fixing metal fitting" for fixing the annular wire member 52, and employs a "holding method" as the fixing method for the anchor 10. The second object to be fixed 12b has a configuration in which the holding portion 16 is removed from the second object to be fixed 12a shown in Figs. 1(A) and (B). In addition, a through hole 56 through which the wire member 52 is inserted is formed in a wall portion 54 corresponding to the connecting portion 20 of the second object to be fixed 12a.

[0057] 5 is a pulley around which the wire 58 is hung, and employs a fitting method for fixing the anchor 10. The first fixed object 12c has a pulley body 60 and a support part 62 that rotatably supports the pulley body 60, and the support part 62 is fitted into the opening 44 (FIG. 2) of the sleeve 26.

[0058] The first fixing object 12d shown in Fig. 6 is a "ground marker" configured similarly to the cap 28 shown in Fig. 2, and employs a "fit-in" method for fixing the anchor 10. In the use state shown in Fig. 6, the head 24 and sleeve 26 of the anchor 10 are embedded in the ground together with the shank 22 so that the top surface 64 of the first fixing object 12d is positioned at approximately the same height (flush) as the ground surface G. The "ground marker" as the first fixing object 12d may include a light-emitting diode (LED).

[0059] The third fixed object 12e shown in FIG. 7 is a "corner post or freestanding pole stand" and employs the "first screw engagement method" as the anchor 10 fixing method. The third fixed object 12e includes a support 68 that supports a cylindrical pole 66. The support 68 has a plate-shaped base 68a and a cylindrical first engagement portion 68b that protrudes downward from the underside of the base 68a and fits into the opening 44 of the sleeve 26. The support 68 also has a cylindrical second engagement portion 68c that protrudes upward from the upper surface of the base 68a and fits into the pole 66. A threaded hole 66a is formed in the peripheral wall of the lower end of the pole 66, and a bolt 70 is threaded into the threaded hole 66a. The tip of the bolt 70 is pressed against the second engagement portion 68c, thereby securing the pole 66 to the support 68.

[0060] Furthermore, a through-hole 72 is formed in the center of the base 68a, and a "bolt" serving as a male thread member 74 having a male thread 74a is inserted from above into the through-hole 72. The male thread 74a is screwed into the female thread 40 of the anchor 10, thereby joining the third fixed object 12e to the head 24.

[0061] The first fixed object 12f shown in FIG. 8 is a "rope catcher" that holds the rope 76, and employs a "fitting method" as a fixing method for the anchor 10. The first fixed object 12f has a C-shaped (sideways) rope holding portion 78 that opens upward, and a cylindrical fitting portion 80 that fits inside the opening 44. The rope holding portion 78 and fitting portion 80 are integrally formed from synthetic resin, and the width of the opening 78a of the rope holding portion 78 is set to be narrower than the diameter of the rope 76. When attaching or detaching the rope 76 to or from the rope holding portion 78, the rope holding portion 78 is elastically deformed, widening the width of the opening 78a.

[0062] (Effect of anchor according to first embodiment) According to this embodiment, the above configuration can achieve the following effects. That is, since the head 24, to which a driving force for propelling the shaft 22 underground is input, is provided at the upper end 22a of the shaft 22 shown in Fig. 3(B), there is no need to pre-form a hole in the ground for inserting the shaft 22 during construction. Therefore, the number of work steps during construction can be reduced, and construction time and costs can be reduced.

[0063] By fitting the first objects 12c, 12d, and 12f (FIGS. 5, 6, and 8) into the openings 44 of the peripheral wall 42 shown in FIG. 3(B), the first objects 12c, 12d, and 12f can be fixed to the ground surface G. Furthermore, by pressing the second objects 12a and 12b (FIGS. 1 and 4) from above with the pressing portions 46 of the peripheral wall 42, the second objects 12a and 12b can be fixed to the ground surface G. Furthermore, by threading the male threads 74a of the male screw member 74 shown in FIG. 7 into the female threads 40, the third object 12e can be fixed to the ground surface G. In other words, a single anchor 10 can be used to selectively fix multiple types of objects 12a to 12f.

[0064] The opposing surface 48 of the holding portion 46 shown in Figure 3 (B) is positioned facing the outer periphery 32 (lower surface 32a) of the head 24 from below, thereby preventing the entire sleeve 26 from moving upward relative to the shaft portion 22 buried in the ground, and preventing the second fixed objects 12a, 12b from detaching upward relative to the shaft portion 22 and head 24.

[0065] Since the peripheral wall portion 42 of the sleeve 26 is disposed around the head 24 shown in FIG. 3(B), when the head 24 and the sleeve 26 are buried in the ground, it is possible to prevent soil from getting around the head 24. Therefore, it is easy to apply the force of a tool (impact wrench, hammer, etc.) to the head 24 buried in the ground. In addition, when the anchor 10 is near the ground surface G, Works Since the external force can be received by the sleeve 26, the external force can be prevented from acting directly on the head 24, and damage or deformation of the head 24 can be prevented.

[0066] The clamping surface 50 shown in Figure 3(B) is tapered so that the outer diameter decreases as it extends downward, and the clamping portion 46 is tapered downward, making it easy to bury the sleeve 26 in the ground.

[0067] 3(B) is configured to be movable in the axial direction relative to the shank 22, so that the head 24 can be removed from the inner space of the sleeve 26 by moving the sleeve 26 downward relative to the head 24. Therefore, when propelling the shank 22 underground, it is easy to apply the force of a tool (such as an impact wrench or a hammer) to the head 24.

[0068] The shaft 22 shown in Figure 3(B) is provided with a spiral drilling blade 30, so that the entire assembly can be propelled axially underground by rotating the head 24, shaft 22, and drilling blade 30 with the rotational force (propulsion force) input from the head 24.

[0069] The head 24 shown in Figure 3(B) is provided with a tool attachment portion 34 to which a rotary tool (such as an impact wrench) for rotating the shaft 22 is attached from the axial direction. This, combined with the fact that the head 24 is provided at the upper end portion 22a of the shaft 22, makes it easy to attach a rotary tool.

[0070] (Variation) The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the scope of the present invention. For example, as shown in FIG. 3(A), in the above-described embodiment, the shank 22 and the head 24 are each formed to have a circular shape in plan view. However, the shape of these is not limited to a circle and may be formed to have a polygonal shape such as a hexagon or an elliptical shape in plan view. Even in these cases, the lower surface 32a can be ensured on the outer periphery 32 of the head 24 by setting the diameter of the first circumscribing circle circumscribing the head 24 in plan view to be larger than the diameter of the second circumscribing circle circumscribing the shank 22.

[0071] As shown in Figure 3(B), in the above embodiment, the head 24 is formed with a female thread 40 into which the male thread 74a (Figure 7) of the male thread member 74 is threaded, but the female thread 40 may be omitted. Even in this case, either the "pressing method" or the "fitting method" can be used as the fixing method for the anchor 10, so that multiple types of fixing objects 12a to 12d, 12f can be selectively fixed.

[0072] 2, in the above embodiment, the spiral digging blade 30 is provided on the outer peripheral surface of the shaft portion 22, but the digging blade 30 may be omitted. In this case, since there is no need to rotate the digging blade 30, there is no need to use a rotary tool, and the propulsive force for propelling the shaft portion 22 into the ground may be input by hitting the upper surface 24a of the head portion 24 with a hammer or the like.

[0073] As shown in Figure 3(B), in the above embodiment, the tool mounting portion 34 provided on the head 24 has a first blind hole 36 into which a hexagonal wrench (not shown) of a rotary tool is inserted, but instead of the first blind hole 36, the tool mounting portion 34 may have two parallel surfaces (not shown) onto which a rotary tool (such as a socket wrench) can be hooked.

[0074] 3(B), in the above embodiment, the sleeve 26 is configured to be movable in the axial direction relative to the shaft portion 22, but the sleeve 26 may be fixed to the shaft portion 22. Even in this case, the peripheral wall portion 42 can prevent soil from entering around the head portion 24, and the peripheral wall portion 42 can protect the head portion 24.

[0075] (Second embodiment) Fig. 9 is a front view (partial cross section) showing the configuration of an anchor 82 according to a second embodiment of the present invention. In the first embodiment described above, the pressing surface 50 of the pressing portion 46 is formed in a tapered shape so that the outer diameter decreases downward, but as in the anchor 82 according to the second embodiment shown in Fig. 9, the pressing surface 50 may be formed as a flat surface perpendicular to the extension direction of the shank 22. Furthermore, if the excavation blade 30 is omitted, there is no need to rotate the excavation blade 30, so the first blind hole 36 (Fig. 3(B)) of the tool mounting portion 34 may be omitted.

[0076] (Third embodiment) Fig. 10 is a front view (partially cross-sectional) showing the configuration of an anchor 84 according to a third embodiment of the present invention. Fig. 11 is a front view (partially cross-sectional) showing the anchor 84 in a first use state, and Fig. 12 is a front view (partially cross-sectional) showing the anchor 84 in a second use state.

[0077] In the first embodiment described above, the inner diameter of the sleeve 26 excluding the lower end 42b of the peripheral wall portion 42 and the outer diameter of the fitting portion 28a of the cap 28 are each uniform over the entire axial length, but they may be tapered so that they increase in size downward, as in an anchor 84 according to a third embodiment shown in Fig. 10. A circumferentially extending groove 88 may be formed in the outer peripheral surface 86 of the peripheral wall portion 42, forming an annular groove 88 along the entire circumference. Furthermore, the outer peripheral surface 86 of the peripheral wall portion 42 may be provided with a fitting surface 86a into which a fourth object 12g (Fig. 12) is fitted, as necessary.

[0078] As shown in Fig. 11, with anchor 84 according to the third embodiment, by arranging annular groove 88 above ground surface G, a rope 90 or the like stretched along ground surface G can be hung in groove 88. Furthermore, since fitting portion 28a of cap 28 shown in Fig. 10 can be fitted into opening 44 while being compressed, it is possible to improve the sealing performance of opening 44 and prevent cap 28 from falling off.

[0079] 12, with the anchor 84 according to the third embodiment, the fourth object 12g can be fixed to the ground surface G by fitting the fourth object 12g to the fitting surface 86a. That is, in addition to the above-mentioned "holding method," "fitting method," and "first screw-engagement method," a "fitting method" can be adopted to fix the fourth object 12g.

[0080] The fourth fixed object 12g shown in Figure 12 is a "freestanding pole stand" that supports the pole 92, and has a cylindrical insertion portion 96 that is removably inserted into the lower end of the pole 92, and a cylindrical support portion 98 that is removably fitted into the mating surface 86a of the anchor 84.

[0081] A through hole 96a having an internal thread is formed in the insertion portion 96 and extends radially, and a first plunger 99 having an external thread is screwed into the through hole 96a. A through hole 92a is formed in the pole 92 at a portion facing the through hole 96a. When the insertion portion 96 is inserted into the lower end of the pole 92, a spherical (or rod-shaped) stopper member 99a provided at the tip of the first plunger 99 is retracted against the bias of a spring member provided inside the first plunger 99. When the insertion of the insertion portion 96 is completed, the stopper member 99a is pushed out by the spring member and fitted into the through hole 92a. This prevents the pole 92 from coming off the insertion portion 96.

[0082] A through-hole 98a having an internal thread is formed in the peripheral wall of the support portion 98 at a portion facing the groove 88 of the anchor 84, and extends radially. A second plunger 100 having an external thread is screwed into the through-hole 98a. The rear end of the second plunger 100 protrudes outward from the outer circumferential surface of the support portion 98, and a nut 100b is threadedly engaged with this rear end. The nut 100b is pressed against the outer circumferential surface of the support portion 98, thereby fixing the second plunger 100 to the support portion 98. When the support portion 98 is fitted into the mating surface 86a of the anchor 84, a spherical (or rod-shaped) stopper member 100a provided at the tip of the second plunger 100 is retracted against the bias of a spring member provided inside the second plunger 100. When the fitting of the support portion 98 is completed, the stopper member 100a is pushed out by the spring member and fitted into the groove 88. This prevents the support portion 98 from coming off the anchor 84.

[0083] 12, a first bolt and a second bolt (not shown) may be used. That is, a threaded hole may be formed in the peripheral wall of the pole 92, a first bolt may be threaded into the threaded hole from the outside, and a tip of the first bolt may be pressed against the outer surface of the insertion portion 96, thereby preventing the pole 92 from coming off the insertion portion 96. Alternatively, a threaded hole may be formed in the peripheral wall of the support portion 98, a second bolt may be threaded into the threaded hole from the outside, and a tip of the second bolt may be pressed against the groove 88 of the anchor 84, thereby preventing the support portion 98 from coming off the anchor 84.

[0084] 12 may be provided with a hook portion (not shown) that hooks onto the inner periphery of the support portion 98, and the second plunger 100 may be fixed to the support portion 98 by sandwiching the circumferential wall of the support portion 98 between the hook portion and the nut 100b. In this case, there is no need to screw the second plunger 100 into the through hole 98a, and therefore the female thread of the through hole 98a can be omitted.

[0085] (Fourth embodiment) FIG. 13 is a diagram showing the configuration of the main parts of the anchor 102 according to the fourth embodiment, where (A) is a plan view and (B) is a front view (partial cross-section). FIG. 14 is a diagram showing a first use state of the anchor 102, where (A) is a front view (partial cross-section) and (B) is an exploded front view (partial cross-section). FIG. 15 is a diagram showing a second use state of the anchor 102, where (A) is a front view (partial cross-section) and (B) is an exploded front view (partial cross-section). FIG. 16 is a diagram showing a third use state of the anchor 102, where (A) is a plan view and (B) is a front view (partial cross-section). FIG. 17 is a diagram showing a fourth use state of the anchor 102, where (A) is a plan view, (B) is a front view (partial cross-section), and (C) is an exploded front view (partial cross-section).

[0086] In the first embodiment, the inner circumferential surface of the circumferential wall portion 42 of the sleeve 26 is formed into a smoothly curved surface, but as in an anchor 102 according to a fourth embodiment shown in Figures 13(A) and (B), the inner circumferential surface of the circumferential wall portion 42 may be formed with female threads (second female threads) 112 into which male threads (second male threads) 104, 106, 108, 110 are threaded as necessary for joining fifth fixed objects 12h to 12k (Figures 14 to 17) to the sleeve 26. In addition, the outer circumferential surface of the circumferential wall portion 42 may be formed with two parallel surfaces 114a, 114b (Figure 13(A)) on which a rotary tool (such as a socket wrench) can be hooked.

[0087] According to the anchor 102 of the fourth embodiment, the fifth objects to be fixed 12h-12k (FIGS. 14-17) can be fixed to the ground surface G by screwing the male threads (second male threads) 104, 106, 108, 110 into the female threads (second female threads) 112. That is, in addition to the above-mentioned "holding method," "fitting method," "first screwing method," and "fitting method," a "second screwing method" can be adopted for fixing the fifth objects to be fixed 12h-12k.

[0088] The fifth fixing object 12h shown in FIGS. 14(A) and (B) is a "ground marker" and includes a marker portion 116, a cap-shaped marker holding portion 118, and a cylindrical main body portion 120. The marker portion 116 is formed in a flexible string-like shape from a synthetic resin such as nylon. The marker holding portion 118 has a plate-shaped portion 118a with two through-holes 122 through which the marker portion 116 passes, and a cylindrical portion 118b, and is formed from a synthetic resin such as nylon. The main body portion 120 includes a male thread portion 120a with a male thread (second male thread) 104 that screws into the female thread (second female thread) 112 of the anchor 102, and a head portion 120b whose outer periphery abuts against the upper end surface of the peripheral wall portion 42.

[0089] Head 120b is formed with hole 124 that is hexagonal in plan view, into which a rotary tool (such as an impact wrench) is inserted axially, and tubular portion 118b of marker holder 118 is fitted into hole 124, thereby attaching marker holder 118 to main body 120. Note that if marker portion 116 is not needed, marker portion 116 may be detached from marker holder 118.

[0090] 15(A) and (B) is a "pole stand" that supports a pole 126 such as a corner flag, and includes a cylindrical stand main body 128 and a male screw member 130 that is integrally formed at the lower end of the stand main body 128. As shown in FIG. 15(B), the male screw member 130 has an embedded portion 130a embedded inside the stand main body 128 and a protruding portion 130b that protrudes from the lower end of the stand main body 128. A male screw (second male screw) 106 that screws into the female screw (second female screw) 112 of the anchor 102 is formed on the outer circumferential surface of the protruding portion 130b. A hexagonal hole 132, as viewed from above, is formed at the upper end of the embedded portion 130a, into which a rotary tool (such as an impact wrench) is inserted axially.

[0091] The fifth fixing object 12j shown in FIGS. 16(A) and 16(B) is a "pipe fixing bracket" for fixing a pipe 134, and includes a cylindrical bracket main body 136 and a semicircular retaining portion 138 for retaining the pipe 134. The type of pipe 134 is not particularly limited, but a portion of a goal post placed in a playground is conceivable, for example. A male thread (second male thread) 108 is formed on the outer peripheral surface of the lower end of the bracket main body 136, and the male thread (second male thread) 108 is threadedly engaged with the female thread (second female thread) 112 of the anchor 102. A hexagonal hole 140 is formed on the upper end of the bracket main body 136, into which a rotary tool (such as an impact wrench) is inserted axially. One end of the retaining portion 138 is joined to the side surface of the bracket main body 136 via a joint 142. In this embodiment, the bracket main body 136 and the retaining portion 138 are welded to the joint 142, and are firmly integrated.

[0092] The fifth fixed object 12k shown in Figures 17(A), (B), and (C) is a "hammer driving head that also serves as a marker," and has a male threaded portion 144 with a male thread (second male thread) 110 that screws into the female thread (second female thread) 112 of the anchor 102, and a cylindrical head 146 whose outer periphery abuts against the upper end surface of the peripheral wall portion 42. The head 146 is the portion that is struck by a hammer 148 shown in Figure 17(B), and the head 146 has two parallel surfaces 150a and 150b on which a rotary tool (such as a socket wrench) can be hooked. Note that when the shank 22 is propelled by driving the hammer 148, the digging blade 30 provides resistance, so it is desirable that the digging blade 30 not be provided at least at the tip of the shank 22, as shown in Figure 17(C).

[0093] (Fifth embodiment) FIG. 18 is a diagram showing the configuration of the main parts of the anchor 152 according to the fifth embodiment, where (A) is a plan view and (B) is a front view (partial cross-section). FIG. 19 is a diagram showing a first use state of the anchor 152, where (A) is a plan view and (B) is a front view (partial cross-section). FIG. 20(A) is a front view (partial cross-section) showing a second use state of the anchor 152, and FIG. 20(B) is a front view (partial cross-section) showing a third use state of the anchor 152. FIG. 21 is a front view (partial cross-section) showing a fourth use state of the anchor 152. FIG. 22 is a diagram showing a fifth use state of the anchor 152, where (A) is a plan view and (B) is a front view (partial cross-section).

[0094] In the fourth embodiment, the outer peripheral surface of the peripheral wall portion 42 of the sleeve 26 is formed into a smooth curved surface, but a male thread (third male thread) 160 may be formed on the outer peripheral surface of the peripheral wall portion 42. Specifically, as in the anchor 152 according to the fifth embodiment shown in Figures 18(A) and 18(B), the outer peripheral surface of the peripheral wall portion 42 may be formed with a male thread (third male thread) 160 into which female threads (third female threads) 154, 156, 158 for joining sixth fixed objects 12m (Figures 19 to 21) and 12n (Figure 22) shown in Figures 19 to 22, respectively, to the sleeve 26 are threaded as needed.

[0095] According to the anchor 152 of the fifth embodiment, the sixth fixing objects 12m (FIGS. 19 to 21), 12n (FIG. 22) can be fixed to the ground surface G by threading the male screw (third male screw) 160 into the female screw (third female screw) 154, 156, 158. That is, in addition to the above-mentioned "holding method," "fitting method," "first screwing method," "fitting method," and "second screwing method," a "third screwing method" can be adopted for fixing the sixth fixing objects 12m, 12n.

[0096] 19(A) and (B) is a leg of a stand placed on a lawn 162, and has a plate-shaped base plate 166 having four through holes 164. Each of the four anchors 152 shown in FIG. 19(B) has, in addition to the configuration shown in FIGS. 18(A) and (B), a first nut 168 having an internal thread (third internal thread) 154 and a second nut 170 having an internal thread (third internal thread) 156. Furthermore, the anchor 152 has a "snap-in type" cap 28 attached to the upper end 42a of the peripheral wall portion 42.

[0097] When fixing the sixth fixed object 12m, first, the shaft 22 of the anchor 152 is buried in the ground. Then, the male thread (third male thread) 160 formed on the peripheral wall 42 of the anchor 152 is screwed into the female thread (third female thread) 156 of the second nut 170. Next, the portion of the peripheral wall 42 above the second nut 170 is inserted from below into the through hole 164 of the base plate 166, and the base plate 166 is placed on the upper surface of the second nut 170. Thereafter, the male thread (third male thread) 160 is screwed into the female thread (third female thread) 154 of the first nut 168, and the first nut 168 is pressed against the upper surface of the base plate 166.

[0098] 19(A) and 19(B), the first nut 168 can hold the base plate 166, so the sixth fixed object 12m can be fixed to the ground surface G. At this time, the first nut 168 and the second nut 170 can sandwich the base plate 166, so the sixth fixed object 12m can be reliably fixed. Furthermore, the second nut 170 can receive the base plate 166, so the sixth fixed object 12m can be fixed in a state spaced apart from the ground surface G.

[0099] 19(A) and (B), the lower end 26a of the sleeve 26 is pressed against the ground surface G, but as shown in Fig. 20(A), a space S may be provided between the lower end 26a of the sleeve 26 and the ground surface G. Also, instead of the "slip-on" cap 28, a "screw-on" cap 172 having a male thread 172a and a hole 172b into which a rotary tool (such as an impact wrench) is inserted may be used.

[0100] 20(B), a spacer 174 may be provided between the lower end 26a of the sleeve 26 and the ground surface G. The spacer 174 is a member having a through-hole 174a through which the shank 22 of the anchor 152 is inserted and a recess 174b into which the lower end 26a of the sleeve 26 is fitted, and is formed in a U-shape in a plan view. When the spacer 174 is used, the shank 22 is received in the through-hole 174a through an opening that opens toward the side of the spacer 174. The spacer 174 may be formed in a cylindrical shape, in which case the spacer 174 is attached in advance around the shank 22.

[0101] 19(A) and (B), the base plate 166 is placed on the upper surface of the second nut 170, but as shown in FIG. 21, the second nut 170 may be omitted and the base plate 166 may be placed on the ground surface G. Even in this case, the base plate 166 can be held down by the first nut 168, so the sixth fixed object 12m can be reliably fixed to the ground surface G. In this case, most of the sleeve 26 is buried in the ground.

[0102] 22(A) and (B) is a "pole stand" that supports a pole 176 such as a corner flag, and includes a cylindrical stand body 178 and a nut 180 that is integrally provided at the lower end of the stand body 178. A female thread (third female thread) 158 into which a male thread (third male thread) 160 of the anchor 152 is screwed is formed on the inner surface of the lower end of the stand body 178 and on the inner surface of the nut 180.

[0103] As shown in FIG. 22(B), when fixing the sixth fixing object 12n, a substrate 182 is placed between the lower end 26a of the sleeve 26 of the anchor 152 and the ground surface G. As shown in FIG. 22(A), a through-hole 182a is formed in the center of the substrate 182, through which the shaft 22 of the anchor 152 is passed in the vertical direction. A slit 182c is formed between the through-hole 182a and a side edge 182b of the substrate 182, and the through-hole 182a opens into the space to the side of the substrate 182 via the slit 182c. As shown in FIG. 22(B), the inner circumferential surface of the through-hole 182a is tapered so that the inner diameter decreases downward.

[0104] When installing the substrate 182 between the lower end 26a of the sleeve 26 and the ground surface G, the shaft 22 of the anchor 152 is passed through the slit 182c to position the shaft 22 relative to the through-hole 182a. In other words, the substrate 182 is positioned with respect to the anchor 152. Next, the substrate 182 is fixed by pressing it with the sleeve 26 of the anchor 152. Thereafter, the sixth fixed object 12n is fixed by screwing the male thread (third male thread) 160 of the anchor 152 into the female thread (third female thread) 158 of the sixth fixed object 12n.

[0105] 22(A) and 22(B) is configured to support a pole 176 such as a corner flag via a sixth fixed object 12n. However, the anchor 152 can also be configured so that the anchor 152 directly supports the pole 176. That is, the corner flag itself can be used as the fixed object. Specifically, a female thread similar to the female thread (third female thread) 158 into which the male thread (third male thread) 160 of the anchor 152 screws is formed on the inner surface of the lower end of the pole 176. Then, by screwing the female thread of this pole 176 into the male thread (third male thread) 160 of the anchor 152 instead of the sixth fixed object 12n, the pole 176 can be directly fixed to the anchor 152. [Explanation of symbols]

[0106] G...ground surface, 10, 82, 84, 102, 152...anchors, 12c, 12d, 12f...first fixed object, 12a, 12b...second fixed object, 12e...third fixed object, 12g...fourth fixed object, 12h to 12k...fifth fixed object, 12m, 12n...sixth fixed object, 14...soccer goal, 22...shaft portion, 24...head, 26...sleeve, 28...cap, 30...drilling blade, 34...tool mounting portion, 36...first blind hole, 38...second blind hole, 40...female thread, 42...peripheral wall portion, 44...opening, 46...holding portion, 48...opposing surface, 50...holding surface.

Claims

1. An anchor for fixing an object to be fixed on the ground surface, A rod-shaped shaft portion to be buried in the ground; a head portion provided coaxially and integrally with the shaft portion at an upper end of the shaft portion, to which a propulsive force for propelling the shaft portion underground is input; a sleeve having a cylindrical peripheral wall portion disposed around the head, a diameter of a first circumscribing circle circumscribing the head in a plan view is set to be larger than a diameter of a second circumscribing circle circumscribing the shank, and a lower surface facing downward is formed on the outer periphery of the head; an opening into which a first fixing object is fitted as necessary is provided at an upper end of the peripheral wall portion; An anchor in which a pressing portion is provided at the lower end of the peripheral wall portion, the pressing portion having an opposing surface that faces the lower surface formed on the outer periphery of the head portion from below, and a pressing surface that is pressed against a second fixed object from above as necessary.

2. An anchor for fixing an object to be fixed on the ground surface, A rod-shaped shaft portion to be buried in the ground; a head portion provided at an upper end of the shaft portion so as to be coaxial with the shaft portion, and into which a propulsive force for propelling the shaft portion underground is input; a sleeve having a cylindrical peripheral wall portion disposed around the head, a diameter of a first circumscribing circle circumscribing the head in a plan view is set to be larger than a diameter of a second circumscribing circle circumscribing the shaft portion, an opening into which a first fixing object is fitted as necessary is provided at an upper end of the peripheral wall portion; a pressing portion is provided at a lower end of the peripheral wall portion, the pressing portion having an opposing surface that faces the outer periphery of the head portion from below and a pressing surface that is pressed against a second fixed object from above as necessary; The head portion has a bottomed hole that opens upward and is coaxial with the shaft portion, An anchor, wherein a first female thread is formed on the inner peripheral surface of the blind hole into which a first male thread for joining a third fixed object to the head is threaded as necessary.

3. An anchor for fixing an object to be fixed on the ground surface, A rod-shaped shaft portion to be buried in the ground; a head portion provided at an upper end of the shaft portion so as to be coaxial with the shaft portion, and into which a propulsive force for propelling the shaft portion underground is input; a sleeve having a cylindrical peripheral wall portion disposed around the head, a diameter of a first circumscribing circle circumscribing the head in a plan view is set to be larger than a diameter of a second circumscribing circle circumscribing the shaft portion, an opening into which a first fixing object is fitted as necessary is provided at an upper end of the peripheral wall portion; a pressing portion is provided at a lower end of the peripheral wall portion, the pressing portion having an opposing surface that faces the outer periphery of the head portion from below and a pressing surface that is pressed against a second fixed object from above as necessary; An anchor, wherein a groove extending in a circumferential direction is formed in an annular shape around the entire circumference of the outer peripheral surface of the peripheral wall portion.

4. An anchor for fixing an object to be fixed on the ground surface, A rod-shaped shaft portion to be buried in the ground; a head portion provided at an upper end of the shaft portion so as to be coaxial with the shaft portion, and into which a propulsive force for propelling the shaft portion underground is input; a sleeve having a cylindrical peripheral wall portion disposed around the head, a diameter of a first circumscribing circle circumscribing the head in a plan view is set to be larger than a diameter of a second circumscribing circle circumscribing the shaft portion, an opening into which a first fixing object is fitted as necessary is provided at an upper end of the peripheral wall portion; a pressing portion is provided at a lower end of the peripheral wall portion, the pressing portion having an opposing surface that faces the outer periphery of the head portion from below and a pressing surface that is pressed against a second fixed object from above as necessary; An anchor, wherein a third male thread is formed on the outer peripheral surface of the peripheral wall portion, and a third female thread is threadably engaged with the third female thread for joining a sixth fixed object to the sleeve as needed.

5. a first nut having the third female thread threadedly engaged with the third male thread; the sixth fixed object has a plate-shaped base plate having a through hole, The anchor according to claim 4 , wherein the peripheral wall portion is inserted into the through-hole, and the first nut is pressed against the upper surface of the base plate.

6. a second nut having the third female thread threadedly engaged with the third male thread; The anchor of claim 5 , wherein the base plate rests on top of the second nut.

7. 7. The anchor according to claim 1, wherein the pressing surface is tapered so that the outer diameter thereof decreases downward.

8. The anchor according to claim 1 , wherein the sleeve is configured to be movable in the axial direction relative to the shaft portion.

9. 9. The anchor according to claim 1, wherein the shank is provided with a helical digging blade.

10. The anchor according to claim 9, wherein the head portion is provided with a tool attachment portion to which a rotary tool for rotating the shank is attached in an axial direction.

11. The anchor according to claim 1 , wherein an outer peripheral surface of the peripheral wall portion is provided with a fitting surface into which a fourth object to be fixed is fitted as required.

12. 12. The anchor according to claim 1, wherein a second female thread is formed on an inner peripheral surface of the peripheral wall portion, and a second male thread is threadably engaged with the second female thread for joining a fifth fixed object to the sleeve as needed.

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